We have a class of 10 students who all spent different amountsof time studying for a quiz. The number of minutes each studentstudied is listed in the table below. Calculate the standarddeviation of the class study time. Remember this is a population,not a sample. Round your answer to the nearest whole minute.
Student | Minutes of Studying |
Student 1 | 82 |
Student 2 | 110 |
Student 3 | 103 |
Student 4 | 106 |
Student 5 | 108 |
Student 6 | 80 |
Student 7 | 107 |
Student 8 | 77 |
Student 9 | 106 |
Student 10 | 121 |
1. The standard deviation of study time for the class is equalto ____ minutes
Part 2:
The height of men in this class is normallydistributed with a mean of 71 inches and a standard deviation of 2inches.
A) A man who has a height of 60 inches is which of thefollowing: A. Shorter than average B. Taller than average C. Aboveaverage
B) Because the data are normally distributed we know thatapproximately ____% of the men in this class have heights between69 and 73 inches.
C) A man with a height of 75 inches is ____ standard deviationsabove the mean.
D) The z-score for a man who is 78 inches is ______
